Nope, from everything I've read and the 'official' posts, only canceling your room incurs the fee. You can change your room a hundred times (through the housing portal) and never incur a fee for doing so.

Also, they are serious about the no exception to the cancellation fee policy. I accidentally booked a room out of town, immediately cancelled and booked a room downtown. This was my first time booking an in block room and I didn't fully understand the policy. I was basically told, "sucks to be you" by customer service.